refactor: drop dead isReady/isTruthy pass-throughs

src/createEffectWhen/createEffectWhen.ts

@@ -24,10 +24,11 @@ import type { DependencyList } from "react";
  *   [user, token]
  * );
  *
- * @example — with a guard predicate for type narrowing
- * const useEffectWhenReady = createEffectWhen(
- *   (deps): deps is ReadyDeps<typeof deps> => predicates.ready(deps)
- * );
+ * NOTE: this bakes `predicate`'s deps shape in at creation time, so it fits a
+ * fixed deps shape reused across call sites. It's not a fit for the
+ * universal predicates like `predicates.ready`/`predicates.truthy` — those
+ * need to narrow a different deps tuple on every call, which is what
+ * `useEffectWhenReady`/`useEffectWhenTruthy` are for.
  */
 export function createEffectWhen<T extends DependencyList, U extends T>(
   predicate: GuardPredicate<T, U>

src/useEffectWhen/useEffectWhen.types.ts

@@ -37,7 +37,7 @@ export interface UseEffectWhenOptions<T extends DependencyList> {
 }
 
 export interface UseEffectWhenPredicates {
-  ready<T extends DependencyList>(deps: T): deps is ReadyDeps<T>;
-  truthy<T extends DependencyList>(deps: T): deps is TruthyDeps<T>;
-  always<T extends DependencyList>(deps: T): deps is T;
+  ready: <T extends DependencyList>(deps: T) => deps is ReadyDeps<T>;
+  truthy: <T extends DependencyList>(deps: T) => deps is TruthyDeps<T>;
+  always: <T extends DependencyList>(deps: T) => deps is T;
 }

src/useEffectWhenReady/useEffectWhenReady.ts

@@ -1,5 +1,4 @@
-import { useEffectWhen } from "../useEffectWhen";
-import { isReady } from "./useEffectWhenReady.utils";
+import { predicates, useEffectWhen } from "../useEffectWhen";
 import type { ReadyDeps, UseEffectWhenEffect, UseEffectWhenOptions } from "../useEffectWhen";
 import type { DependencyList } from "react";
 
@@ -8,5 +7,5 @@ export function useEffectWhenReady<T extends DependencyList>(
   deps: T,
   options?: UseEffectWhenOptions<T>
 ): void {
-  useEffectWhen(effect, deps, isReady, options);
+  useEffectWhen(effect, deps, predicates.ready, options);
 }

src/useEffectWhenTruthy/useEffectWhenTruthy.ts

@@ -1,5 +1,4 @@
-import { useEffectWhen } from "../useEffectWhen";
-import { isTruthy } from "./useEffectWhenTruthy.utils";
+import { predicates, useEffectWhen } from "../useEffectWhen";
 import type { TruthyDeps, UseEffectWhenEffect, UseEffectWhenOptions } from "../useEffectWhen";
 import type { DependencyList } from "react";
 
@@ -8,5 +7,5 @@ export function useEffectWhenTruthy<T extends DependencyList>(
   deps: T,
   options?: UseEffectWhenOptions<T>
 ): void {
-  useEffectWhen(effect, deps, isTruthy, options);
+  useEffectWhen(effect, deps, predicates.truthy, options);
 }